.container {
    background-color: lightcoral;
    width: 50%;
    height: 1000px;
    margin: 10px;
    padding: 5px;
    
}

.row {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-evenly;
    width: 100%;
}

.blk {
    margin-top: 10px;
    height: 33.3vh; 
    padding: 1vh;
    box-sizing: border-box;
    border: 1px solid black;
    line-height: 33.3vh;
    text-align: center;
}

/* @media(min-width: 768px) {
    .col-md-6 {
        width: 50%;
        background-color: lightblue;

    }

    .col-md-12 {
        width: 50%;
        background-color: lightcyan;

    }
}

@media(max-width: 767px) {
    .col-sm-6 {
        width: 50%;
        background-color: lightgrey;
    }

    .col-sm-12 {
        width: 100%;
        background-color: lightpink;
    }
} */
